The Collaborative International Dictionary of English v.0.48:

Rival \Ri"val\, v. t. [imp. & p. p. Rivaledor Rivalled; p.
   pr. & vb. n. Rivaling or Rivalling.]
   1. To stand in competition with; to strive to gain some
      object in opposition to; as, to rival one in love.
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   2. To strive to equal or exel; to emulate.
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            To rival thunder in its rapid course. --Dryden.
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